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Finding the Fourth Proportional to 355,648.27, 490,218.48 and 277,988.66

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Solution

The fourth proportional to 355,648.27, 490,218.48 and 277,988.66 is: 383,174.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,648.27 : 490,218.48 = 277,988.66 : x
  2. Step 2: Convert to fraction form
    355,648.27/490,218.48 = 277,988.66/x
  3. Step 3: Cross multiply
    355,648.27x = 490,218.48 × 277,988.66
  4. Step 4: Simplify right side
    355,648.27x = 136,275,177,749.66
  5. Step 5: Solve for x
    x = 136,275,177,749.66/355,648.27
  6. Step 6: Final answer
    x = 383,174.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.